Full-Plastic Liquid Pump Using Plastic Spring and One-Way Valve
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Solution Overview
Problem
Existing emulsion pumps are made of multiple materials, requiring complex recycling processes and increasing environmental and resource costs, with metal springs prone to contamination when immersed in liquid.
Innovation Solution
A full-plastic liquid pump design using a plastic spring and one-way valve, allowing for complete recycling without material separation, reducing production and recycling costs, and preventing contamination by keeping the spring insulated from the liquid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal spring and glass ball valve are used in the emulsion pump, then the pump can switch between compressed and initial states frequently with sufficient elastic force, but the pump requires multiple materials (metal, glass, plastic) which increases recycling complexity and cost
Solution Approach 1:
The patent applies homogeneity by replacing the metal spring and glass ball valve with plastic components made from the same material as the pump body. This creates a homogeneous structure where all components are made of plastic, eliminating the need for material separation during recycling and reducing recycling complexity while maintaining the functional requirements of frequent switching and elastic force.
2Force
If a metal spring is used in the emulsion pump, then the spring can provide sufficient elastic force to drive the liquid outlet pipe and piston, but the metal spring is prone to reacting with and contaminating the liquid after long-time immersion
Solution Approach 1:
The patent replaces the durable metal spring with a plastic spring that, while potentially having shorter lifespan, eliminates the harmful effect of metal-liquid reactions. The plastic material is chemically inert to the liquid, preventing contamination. This trade-off prioritizes liquid purity over component longevity, aligning with the principle of using disposable or replaceable components that prevent harmful interactions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates easier and more cost-effective recycling, maintains liquid purity by preventing spring corrosion, and enhances environmental protection through reduced material complexity.
Implementation Method 1
the elastic portion is deformably and curvedly extended from the upper maintaining portion to the lower maintaining portion. During the process that the upper maintaining portion and the lower maintaining portion are driven to approach each other, the elastic portion is squeezed to generate an elastic deformation and accumulate an elastic potential energy
Implementation Method 2
the liquid inlet hole is opened or closed by the plastic one-way valve. When the pressing head is pressed, the pressure in the accommodating space increases, the liquid inlet ball valve closes the opening of the pipette
Data Source
AI summary
Disclosed is a full-plastic liquid pump and a containing container having same, which employs a plastic spring (12) and a plastic one-way valve (15), wherein the plastic spring (12), the plastic one-way valve (15), and other parts of the full-plastic liquid pump are all made of plastic materials. The full-plastic liquid pump can be recycled as a whole without splitting, which reduces the cost of recycling the full-plastic liquid pump, and facilitates improving the utilization rate of resources, thereby better facilitating protecting environment.